S83.41 - Sprain of medial collateral ligament of knee S83.4 - Sprain of collateral ligament of knee S83.41 - Sprain of medial collateral ligament of knee S83.411 - Sprain of medial collateral ligament of right knee S83.412 - Sprain of medial collateral ligament of left knee S83.419 - Sprain of medial collateral ligament of unspecified knee